An electromagnetic relay includes a spool in which a coil is wound around its outer peripheral surface, and a magnetic core is inserted in its inside; a yoke arranged along the spool; and an insulating member provided between a first member including the coil, and second members including a fixed contact portion, a movable contact portion, an armature and the yoke to contribute to insulation between the first member and the second members, wherein the insulating member is provided with an opening portion at a portion that does not face the second members, and the spool is inserted in the insulating member from the opening portion to be placed in the insulating member.
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6. An electromagnetic relay comprising:
a spool in which a coil is wound around its outer peripheral surface;
a contact portion that includes a fixed contact and a movable contact that contacts the fixed contact;
an armature that is operated to move the movable contact between a contacting position at which the fixed contact contacts the movable contact, and a non-contacting position at which the fixed contact and the movable contact are apart from each other;
a yoke arranged along the spool and is positioned between the spool and the contact portion; and
an insulating member that includes
a back surface positioned between the spool and the yoke,
an upper surface provided at an upper end of the back surface that covers an upper end of the spool,
a lower surface provided at a lower end of the back surface that covers a lower end of the spool, and
two side surfaces provided at each side of the back surface, respectively, each of the side surfaces covering a different side of the spool,
wherein an opening portion is provided at a side of the insulating member opposite to the back surface, and
wherein the spool is capable of being inserted in the insulating member form the opening portion toward the back surface.
1. An electromagnetic relay comprising:
a fixed contact portion that includes a fixed contact;
a movable contact portion that includes a movable contact that contacts the fixed contact;
an armature that is connected to the movable contact portion, and is operated to rotate to move the movable contact portion between a contacting position at which the fixed contact contacts the movable contact, and a non-contacting position at which the fixed contact and the movable contact are apart from each other;
a spool in which a coil is wound around its outer peripheral surface, and a magnetic core is inserted in its inside;
a yoke arranged along the spool; and
an insulating member provided between a first member including the coil, and second members including the fixed contact portion, the movable contact portion, the armature and the yoke to contribute to insulation between the first member and the second members,
wherein the insulating member is provided with an opening portion at a portion that does not face any of the second members so that the spool is capable of being inserted in the insulating member from the opening portion to be placed in the insulating member,
wherein the insulating member includes a base mold including
a back surface,
a right side surface and a left side surface provided at both sides of the back surface, respectively, and
an upper end surface and a lower end surface provided at an upper end and a lower end of the back surface, respectively,
wherein the open portion is provided to be surrounded by the right side surface, the upper end surface, the left side surface and the lower end surface, and
wherein the spool is capable of being inserted in the base mold from the opening portion toward the back surface to be placed in the base mold.
2. The electromagnetic relay according to
wherein the insulating member is formed to have a concave shape that extends along an outer peripheral of an upper end surface or a lower end surface of the spool.
3. The electromagnetic relay according to
4. The electromagnetic relay according to
5. The electromagnetic relay according to
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The present invention relates to an electromagnetic relay.
Electromagnetic relays in which a contact is opened and closed in accordance with an input of an electric signal are conventionally widely provided. Generally, the electromagnetic relays include a fixed contact portion, a movable contact portion that contacts the fixed contact portion, and an electromagnetic device that operates the movable contact portion.
The electromagnetic device is provided with a spool around which a coil is wound. The electromagnetic relay includes an insulating structure in order to prevent the coil of the electromagnetic device from electrically connected to the fixed contact portion or the movable contact portion.
Patent Document 1: Japanese Laid-open Patent Publication No. H11-96876
Patent Document 2: Japanese Laid-open Patent Publication No. H7-254340
Patent Document 3: Japanese Laid-open Patent Publication No. H11-111143
As an insulating effect of the insulating structure differs based on the arrangement, the shape or the like of an insulating member, it is important for the electromagnetic relay to form the insulating member in accordance with each of the structures. Meanwhile, if the insulating structure is complicated, that influences the fabrication of the electromagnetic relay. Thus, it is necessary to provide an insulating structure capable of fabricating easily.
Thus, it is desirable to provide an electromagnetic relay including an insulating structure for which the fabrication is easy with a high insulating effect.
According to one embodiment, there is provided an electromagnetic relay including a fixed contact portion that includes a fixed contact; a movable contact portion that includes a movable contact that contacts the fixed contact; an armature that is connected to the movable contact portion, and is operated to rotate to move the movable contact portion between a contacting position at which the fixed contact and the movable contact contact, and a non-contacting position at which the fixed contact and the movable contact are apart from each other; a spool in which a coil is wound around its outer peripheral surface, and a magnetic core is inserted in its inside; a yoke arranged along the spool; and an insulating member provided between a first member including the coil, and second members including the fixed contact portion, the movable contact portion, the armature and the yoke to contribute to insulation between the first member and the second members, wherein the insulating member is provided with an opening portion at a portion that does not face the second members, and the spool is inserted in the insulating member from the opening portion to be attached to the insulating member.
According to at least one embodiment, it is possible to provide an electromagnetic relay including an insulating structure for which the fabrication is easy with a high insulating effect.
The invention will be described herein with reference to illustrative embodiments. It is to be noted that, in the explanation of the drawings, the same components are given the same reference numerals, and explanations are not repeated.
(1. Overall Structure of Electromagnetic Relay)
First, the overall structure of an electromagnetic relay of the embodiment is described.
As illustrated in
The fixed contact portion 110 includes two fixed contact springs 111 and two fixed contacts 112, and the fixed contact springs 111 are connected to the different terminals 160, respectively. Similarly, the movable contact portion 120 includes two movable contact springs and two movable contacts, that face the corresponding fixed contact springs 111 and the corresponding fixed contacts 112, respectively. The two movable contact springs are connected to an armature 131 via a holding member 136. Here, in
The electromagnetic device 130 includes the armature 131, a magnetic core 132, a coil 133, a yoke (soft iron) 134, a hinge spring 135 and the holding member 136.
The armature 131 is configured to be operated to rotate around an upper end portion of the yoke 134 as a fulcrum. When the armature 131 is operated to rotate around the upper end portion of the yoke 134 as a fulcrum, the movable contact portion 120 connected to the armature 131 via the holding member 136 is operated to reciprocate between a contacting position at which the movable contacts and the fixed contacts contact, and a non-contacting position at which the movable contacts and the fixed contacts do not contact.
The armature 131 adsorbs to and moves away from an end surface (a magnetic core surface) of the magnetic core 132. Specifically, when electromagnetic force is generated due to voltage applied to the terminals 170 connected to the coil 133, the armature 131 is adsorbs to the magnetic core surface. As a result, the movable contact portion 120 moves to the contacting position. Here, when the movable contact portion 120 moves to the contacting position, one of the terminals 160 is electrically connected to the other of the terminals 160 via one of the fixed contacts and movable contacts, the holding member and the other of the movable contacts and fixed contacts.
The hinge spring 135 pushes the armature 131 in a direction that the armature 131 moves away from the magnetic core surface. As the hinge spring 135 always pushes the armature 131 in a direction in which the armature 131 moves away from the magnetic core surface, if the application of the voltage to the terminals 170 is terminated, the armature 131 departs from the magnetic core surface and the movable contact portion 120 moves to the non-contacting position. Then, the movable contact portion 120 is maintained at the non-contacting position until the voltage is applied to the terminals 170 next.
(2. Description of Insulating Structure Included in Electromagnetic Relay)
Next, the insulating structure included in the electromagnetic relay 100 is described.
The base mold 140 is formed by an insulating material such as resin, and the spool 201 is attached inside the base mold 140. The armature 131 is placed along a side surface and an upper surface of the spool 201 while sandwiching the base mold 140 between the armature 131 and the spool 201. The yoke 134 is placed along the side surface and a bottom surface of the spool 201 while sandwiching the base mold 140 between the yoke 134 and the spool 201, and has an L shape.
As the spool 201 is attached inside the base mold 140, and the base mold 140 is sandwiched between the coil 133 and the armature 131, the armature 131 is insulated from the coil 133 by the disc-like shaped member 201a of the spool 201 and the base mold 140. Further, as the spool 201 is attached inside the base mold 140, and the base mold 140 is sandwiched between the coil 133 and the yoke 134, the yoke 134 is insulated from the coil 133 by the disc-like shaped member 201c of the spool 201 and the base mold 140.
Further, the fixed contact portion 110, the movable contact portion 120 and the like are provided at opposite (left of the yoke 134 in
As such, the base mold 140 contributes to the insulation of the coil 133 between the yoke 134, the armature 131, the movable contact portion 120, the fixed contact portion 110 (not illustrated in
(3. Arrangement and Shape of Insulating Member)
Next, the arrangement and the shape of the insulating member (base mold 140, spool 201) in the electromagnetic relay 100 are further described in detail.
As illustrated in
In the electromagnetic relay 100 of the embodiment, the contact-side members are arranged at an upper surface, one side surface, a bottom surface and a center position of the spool 201. Among them, the magnetic core 132, which is the contact-side member that is arranged at the center position of the spool 201, is insulated from the coil-side member by the disc-like shaped members 201a and 201c and the column portion 201b of the spool 201.
Meanwhile, in order to insulate the contact-side members that are arranged at the upper surface, the one side surface and the bottom surface of the spool 201 from the coil-side member, it is effective to provide the insulating member between the contact-side members and the coil-side member to cover the upper surface, the one side surface and the bottom surface of the spool 201 by the insulating member.
Thus, according to the electromagnetic relay 100 of the embodiment, a structure is adopted in which the upper surface, the one side surface (specifically, a side surface portion that faces the yoke 134) and the bottom surface of the spool 201 are covered by the base mold 140 having a U-shape in a cross-sectional view.
(4. Shape of Base Mold and Method of Attaching Spool)
Next, the shape of the base mold 140 and the method of attaching the spool 201 are described.
As illustrated in
As such, the opening portion of the base mold 140 is used as an attaching port of the spool 201 to the base mold 140. As the contact-side members are not arranged in the vicinity of the opening portion, it is considered that the insulation between the contact-side members and the coil-side member are retained even when the opening portion is not covered by the base mold 140, which is the insulating member. Further, by using the opening portion as the attaching port, the fabrication such as the attachment of the spool 201 to the base mold 140 or the like can be made easy while actualizing a high insulating effect.
(5. Cover that Covers Contact-Side Members)
As already described with reference to
As described above with reference to
(6. Summary)
As is apparent from the above description, according to the electromagnetic relay of the embodiment,
As such, by setting the arrangement and the shape of the insulating member to correspond to the arrangement of the contact-side members and the arrangement of the coil-side member, a high insulating effect can be obtained. Further, by using the opening portion provided at the portion that does not influence to the insulating effect, the spool can be easily attached. In other words, it is possible to provide an electromagnetic relay for which the fabrication is easy with a high insulating effect.
Here, the base mold 140 and the spool 201 may be fixed by a method of fixing with a higher insulating effect, for example.
Similarly, as illustrated in an enlarged area 710 of
Further, as illustrated in a plan view of
As such, when attaching the spool 201 to the base mold 140, by fixing the disc-like shaped members 201a and 201c of the spool 201 and the base mold 140 without a space, insulating properties can be further improved.
Although the structure is adopted in the above embodiment in which the grooves 701 and 711 are provided at the disc-like shaped members 201a and 201c, respectively, and the protrusions 702 and 712 are provided at the corresponding positions in the base mold 140, a structure may be adopted in which only one of the grooves and the protrusions are provided.
A structure may be adopted in which an adhesive agent is coated on a member (a bottom surface of the L-shaped yoke 134) that is arranged at a lowest surface among the contact-side members, and then the bottom plate 150 is provided. By coating the adhesive agent, it is possible to improve insulating properties between the member (the L-shaped yoke 134) that is arranged at the lowest surface and outside. Here, the bottom surface of the magnetic core is attached to the bottom surface of the yoke 134 by caulking.
The present invention is not limited to the specifically disclosed embodiments, and numerous variations and modifications may be made without departing from the spirit and scope of the present invention.
The present application is based on and claims the benefit of priority of Japanese Priority Application No. 2014-138119 filed on Jul. 3, 2014, the entire contents of which are hereby incorporated by reference.
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Oct 19 2016 | KUBONO, KAZUO | Fujitsu Component Limited | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 040148 | /0837 |
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